As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FOUL SMELL REPORTED IN CABIN. MAINTENANCE FOUND WASTE DRAIN LINE ABOVE RECIRCULATION FILTER LEFT HAND BROKEN, WHICH WAS LEAKING ONTO RECIRCULATION FILTER. MAINTENANCE REPLACED WASTE DRAIN LINE ABOVE LEFT HAND RECIRCULATION FILTER PER AMM 38-31-00 AND PERFORMED SATISFACTORY OPERATIONAL CHECK.